Which of these fits gap 21?

Directions: Complete this passage by selecting the most suitable option for the corresponding gap.
Gorilla, chimpanzee and orangutan are some of the animals which resemble man in many _____ (21) _____. Among these animals, chimpanzee has the _____ (22) _____ resemblance to man. In fact, the bone structure of all these animals has many similarities to that of man. Their constitution and the number of their teeth are _____ (23) ______ to ours. Like human beings, they too have wrinkles on their forehead. Their skulls are also like ours. Even their blood is similar to ours. _____ (24) ______ , they cannot speak like us.