If C and R denote capacitance and resistance, the dimensional

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If C and R denote capacitance and resistance, the dimensional formula of CR is

1. [M⁰L⁰T¹]
2. [M⁰L⁰T⁰]
3. [M⁰L⁰T^{– 1}]
4. not expressible in terms of M,L,T.

Correct Option: A

CR = [M^–1L^–2T⁴A²] [M¹L²T^–3A^–2]
= [M⁰L⁰T¹]