[A]: Deficiency of sulphur causes chlorosis in plants.
[R]: Sulphur is a constituent of chlorophyll protein & nucleic ~~ids.

Options

A. If both assertion and reason are true and reason is the correct explaination of assertion
B. If both assertion and reason are true but reason is not correct explaination of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

C

Explanation

Sulphur is not a constituent of chlorophyll but it helps in chlorophyll formation.Due to the deficiency of sulphur,chlorosis often appers first in the young leaves.Mineral constituent of chlrophyll is magnesium which is situated in the centre of the porphyrin ring.