Given a sentence with a missing word, pick the answer option that best fills out the missing word in the sentence. Indicate each answer with its index ('a', 'b', 'c', 'd').

Input: Consider Input: Plants have three and ____ way branching carying sixteen buds.\Question: Choose the right answer from options given a) seven b) six c) four d) ten

Output: c


Input: Consider Input: Neutrinos are particles with almost ____ mass and no electric charge.\Question: Choose the right answer from options given a) no b) two c) zero d) five

Output: a


Input: Consider Input: Singular matrices have ____ determinants.\Question: Choose the right answer from options given a) two b) eight c) six d) zero


Output: d