In gymnosperms : 1. The gymnosperms are heterosporous. 2. They produce diploid microspores and megaspores. 3. The two kinds of spores are produced within sporangia 4. Sporangia are borne on sporophylls which are arranged spirally along an axis to form lax or compact strobili or cones. Regarding 1,2,3 and 4:

Question

( a ) 1 and 2 are correct; 3 and 4 are incorrect
( b ) 4 is incorrect; 1,2 and 3 are correct
( c ) 3 and 4 are correct; 1 and 2 are incorrect
( d ) 2 is incorrect; 1,3 and 4 are correct