What are the horse latitudes?

Consider the following statements.

Assertion (A): The eastern coasts of continents within the tropics have much heavier rainfall than the interiors or the west coasts.

Reason (R): All western coasts fall in the rain shadow zone.

In the context of the above, which of these is correct?

In percentage terms, water vapour in the atmosphere, generally

1. Increases as we move to higher grounds

2. Decreases towards the poles if we start from equator

Which of the above is/are correct?

Rain clouds appear black in colour despite having the Sun above them because

1. Clouds accumulate electrostatic charge

2. Rain-bearing clouds absorb most of the solar insolation falling on them.

3. Clouds scatter light received by them.

Select the correct answer using the codes below.

Generally, the capacity of air to hold moisture in the form of water vapour is likely to be greater in