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Option 4 : All are true

Statement I:

⇒ Positive factors of 72: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

Total factors = 12

∴ Statement I is true

Statement II:

We know that sum of first n odd numbers = n2

⇒ Sum of first 20 odd numbers = 202 = 400

∴ Statement II is also true.

Statement III:

Largest two digit prime number is 97

∴ Statement III is also true

∴ All Statements are true.

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