Two masses,both equal to $100\, g$,are suspended at the ends of identical light strings of length $\ell = 1.0\, m$,attached to the same point on the ceiling (see figure). At time $t = 0$,they are simultaneously released from rest,one at angle $\theta_1 = 1^o$,the other at angle $\theta_2 = 2^o$ from the vertical. The masses will collide

• A
  at $\theta = 0.0^o$,$0.50\, s$ later.
• B
  at $\theta = 5.0^o$ to the right of the vertical,$0.16\, s$ later.
• C
  at $\theta = 0.0^o$,$0.13\, s$ later.
• D
  at $\theta = 5.0^o$ to the right of the vertical,$0.10\, s$ later.