Tips & Tricks The pattern followed here is a continuous series of ‘mno’. By checking each option: 1) mnono → mno/mno/moo/nno/mno 2) mmono → mno/mmo/moo/nno/mno 3) nmnno → nno/mmo/mno/nno/mno 4) mnnmo → mno/mno/mno/mno/mno The sequence is properly continued only in option 4. Hence, answer is option 4