Regarding Arthropoda : 1. It is the second largest phylum of Animalia 2. It includes insects. 3. Over one-thirds of all named species on earth are arthropods Regarding 1,2 and 3:

Question

( a ) 1 is incorrect but 2 and 3 are correct
( b ) 2 is incorrect but 1 and 3 are correct
( c ) 2 is correct but 1 and 3 are incorrect
( d ) 3 is incorrect; 1 and 2 are correct