2. In IVF the fertilization is : a) Always External b) Always Internal c) Can be any one of the two d) Fertilisation does not occur

option a) is correct.

Explanation:

in IVF the fertilisation is always external.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds