When coal is heated strongly in the absence of air, a gaseous fuel is obtained. This fuel is a mixture of carbon dioxide, methane, and hydrogen. Coke is also a product of such a process.

In the absence of oxygen, Combustion cannot occur. Therefore the wood can get heated to a level where its main component, Cellulose, breaks down. When this happens, carbon and charcoal are formed.

Answer is D Car B will be a right choice for the customer

Follow the steps below to Enter a row at the end of table:

1.Selelct last row.

2.Right Click.

3.Choose Option Insert.

4.Make Selection how many rows you wanna insert.

5.Press OK.

To Insert Column:

• Select Last Column.
• Right Click.
• Choose insert Column
• Mention number of columns you want to insert
• Press Ok

TO rename a file/folder you can follow steps bellow:

• Right cilick that file/folder.
• Choose option rename
• Give file/folder new name
• Hit ENTER.

You can also do this using Shortcut as below:

• Select file/folder.
• Hit F2 key from keyboard.
• Give file/folder new name.
• Hit ENTER.

Insert a manual page break. Click where you want to start a new page. On the Insert tab, in the Pages group, click Page Break.and u can also watch video on you tube its very easiest technique

• PROM is the older technology while both PROM and EPROM are nonvolatile memory devices.

• PROMs can be programmed only once while EPROMs are reusable and can be programmed multiple times.

• The process in the programming of PROMS is irreversible; hence the memory is permanent. In EPROMs memory can be erased by exposure to UV light.

• EPROMs have a fused quartz window in the packaging to allow this. PROMs are enclosed in complete plastic packaging; therefore UV has no effect on PROMs

• In PROMs data is written/ programmed onto the chip by blowing the fuses at each bit using much higher voltages than the average voltages used in digital circuits. EPROMS also use high voltage, but not enough to alter the semiconductor layer permanently.

In some PC's It is an Icon Which shows Other computers, Printers , or decices linked to you computer through common LAN connection. So network Neighbouhood are neighbour resources  to you LAN connection.

Input devices are those, which can send data (input) to the computer, but they cannot receive or reproduce information (output) from the computer. An output device can receive data from another device, but it cannot send data to another device. Eg- mouse, keyboard are input devices.. Monitor, speaker r output devices..

Read-only memory (ROM) is a class of storage medium used in computers and other electronic devices. Data stored in ROM can only be modified slowly, with difficulty, or not at all, so it is mainly used to distribute firmware (software that is very closely tied to specific hardware, and unlikely to need frequent updates).