Definition: You are given a question on astronomy. Astronomy is a natural science that studies celestial objects and phenomena. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Besides large astronomical objects astrophysicists are also interested in small particles from space. Which one of these particles has the weakest interactions with other particles?
(A)µ Muons (B)Antiparticles (C)ν Neutrinos (D)π Pions

C