A dikaryon is formed when
1.  meiosis is arrested

2.  the two haploid cells do not fuse immediately

3.  cytoplasm does not fuse

4.  None of the above

Members of Phycomycetes are found in
(i) Aquatic habitats

(ii) On decaying wood

(iii) Moist and damp places

(iv) As obligate parasites on plants

Choose from the following options.
1.  (i) and (iv)

2.  (ii) and (iii)

3.  All of these

4.  None of these