If two positive integers p and q can be expressed as p = 18a ^ 2 * b ^ 4 and q = 20a ^ 3 * b ^ 2

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If two positive integers p and q can be expressed as p = 18a ^ 2 * b ^ 4 and q = 20a ^ 3 * b ^ 2 where a and b are prime numbers, then LCM (p, q) is :

(a) 2a²-b²

(b) 180 a²b²

(c) 12 a²b² 2

(d) 180 a³b4

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