What is the third step of the hydrogen fusion process? + → + e+ + v + energy + → +2 + energy + → + energy 6 + 2 → + 2 + energy + 2v

The fusion reaction in the Sun is as follows

₁¹H+ ₁¹H ---> ₁²H + ₊₁°e⁺+ ν

₁²H+ ₁¹H ---> ₂³He + γ

₂³He + ₂³He ---> ₂⁴He + ₁¹H+ ₁¹H

So comparing these equations with options given.

We will get option A is the correct answer that

₁¹H+ ₁¹H ---> ₁²H + ₊₁°e⁺+ ν

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.