Explanation:

EXPLANATION:

STATEMENT 1 IS INCORRECT. In the tropical cyclones cumulonimbus clouds with great vertical extent are generated. In the tropical cyclones cumulonimbus clouds with great vertical extent are generated. Nimbus clouds are thick mass of water vapour & rain carrying clouds generally occur as nimbus or in combination of nimbus like cumulonimbus or stratonimbus etc. Cirrus are the highest clouds formed between the altitude of 8 km to 12 km.
Cirrus Clouds:
Cirrus clouds are formed at high altitudes (8000 – 12000m). They are thin and detached clouds having a feathery appearance. They are always white in colour.
Cumulus Clouds
Cumulus clouds look like cotton wool. They are generally formed at a height of 4000 -7000 m. They exist in patches and can be seen scattered here and there. They have a flat base.
Stratus Clouds
As their name implies these are layered clouds covering large portions of the sky. These clouds are generally formed either due to loss of heat or the mixing of air masses with different temperatures.
Nimbus Clouds
Nimbus clouds are black or dark gray. They form at middle levels or very near to the surface of the earth. These are extremely dense and opaque to the rays of the sun. Sometimes the clouds are so low that they seem to touch the ground. Nimbus clouds are shapeless masses of thick vapour.
A combination of these four basic types can give rise to the following types of clouds:
High clouds – cirrus cirrostratus cirrocumulus;
Middle clouds – altostratus and altocumulus;
Low clouds – stratocumulus and nimbostratus (long duration rainfall cloud) and
Clouds with extensive vertical development – cumulus and cumulonimbus (thunderstorm cloud)