In class XII, the number of girls in the school ______ is more than the combined number of girls in the school ______ and ______.

Calculate the number of girls in Class XII for all schools to satisfy the condition:

$\text{Girls}(A) > \text{Girls}(B) + \text{Girls}(C)$

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Using the formula: $\text{Girls} = \text{Total} \times (100\% - \% \text{Boys})$

School	Total Students (XII)	% Boys	% Girls	Calculation	No. of Girls
S1	125	80%	20%	$125 \times 0.20$	25
S2	100	45%	55%	$100 \times 0.55$	55
S3	120	60%	40%	$120 \times 0.40$	48
S4	150	40%	60%	$150 \times 0.60$	90

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Checking each option to find where the first school has more girls than the sum of the other two:

Option 1: S4, S1, S2

$\text{Girls}(S4) > \text{Girls}(S1) + \text{Girls}(S2)$

$90 > 25 + 55$

$90 > 80$

This is TRUE.

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Option 2: S2, S1, S4

$55 > 25 + 90$

$55 > 115$

This is FALSE.

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Option 3: S2, S1, S3

$55 > 25 + 48$

$55 > 73$

This is FALSE.

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Option 4: S4, S2, S3

$90 > 55 + 48$

$90 > 103$

This is FALSE.

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Therefore, the answer is Option 1: S4, S1, S2.