A nucleus of $^{238}_{92}c6$ undergoes a sequence of decays by releasing $b1$-particles and $b2^-$ particles, and finally becomes a nucleus of $^{206}_{82} 43$. How many $b1$-particles and how many $b2^-$ particles are released in the decay chain?
- A$8$ $b1$-particles and $6$ $b2^-$ particles
- B$8$ $b1$-particles and $10$ $b2^-$ particles
- C$16$ $b1$-particles and $6$ $b2^-$ particles
- D$16$ $b1$-particles and $22$ $b2^-$ particles