. Given below are statements about the harmful effects of weeds on crop plants

(i) they interfere in harvesting.

(ii) they help crops plants to grow healthy

(iii) they complete with crop plants for water, nutrients, space and light.

(iv) they affect plant growth.

Choose the correct combination of statements.

(a) i, iii, iv                        

(b) iii only

(c) iii, iv                          

 (d) i, ii, iii, iv