Q. Assertion (A) : Average ocean salinity generally decreases from equator the pole but tropical zone (20° - 30°) is charcterized by maximum salinity.
Reason (R) : The tropical zone owes its high salinity to high temperature, high evaporation and significantly low rainfall.
Codes :

• (A) Both (A) and (R) are true and (R) is the correct explanation of (A)
• (B) Both (A) and (R) are true but (R) is not a correct explanation of (A)
• (C) (A) is true but (R) is false
• (D) (A) is false but (R) is true