Solution:We put all the option in blank area and check who create particular pattern
J _ JJ _ _ JM _ _ MJ
JJMMJ → J J J / J J M / J M M / J M J
MJJMM → J M J / J J J / J M M / M M J
JMMJM → J J J / J M M / J M J / M M J
But,
MMJJJ → J M J / J M J / J M J / J M J
Hence, "MMJJJ" is the correct answer.