Correct Answer - Option 2 : A – 3, B – 1, C - 2

**Causes for voltage drop:**

(i) drop due to armature resistance i.e. I_{a}R_{a} drop

(ii) drop due to armature leakage resistance i.e. I_{a} X_{ℓ} drop

(iii) drop due to armature reaction i.e. I_{a}X_{a} drop.

Now, ‘I_{a}X_{ℓ}’ will be the phase with ‘I_{a}X_{a}’

X_{ℓ} + X_{a} = X_{s}

R_{a} + jX_{s} = Z_{s}

In synchronous machine irrespective of its rating always, X_{s} > X_{a} > X_{ℓ} > R_{a}

We know, Z_{s} = R_{a} + j(X_{a} + X_{ℓ})

Since X_{s} = X_{a} + X_{ℓ}

⇒ Z_{s} = R_{s} + j(X_{s})