The correct option is D 713
The sequence in the numerators is +2,+3,+4,+5 and that in the denominators is +4,+6,+8,+10.
So,the numerator of the missing fraction should be (4+3) i.e. 7 and the denominator should be (7+6) i.e.13.
Thus, the missing term is 713
Hence, option C is the correct answer.