As per IS 456 expression, modulus of elasticity of M30 concrete is nearly

Why is this the answer?

IS 456:2000 empirical formula for modulus of elasticity of normal-weight concrete: Ec = 5000 * sqrt(fck) MPa, where fck = characteristic cube strength (N/mm^2). Short-term static modulus; long-term effective modulus = Ec/(1+theta), theta = creep coefficient (typically 1.6–2.2). Used in structural deflection and stability analysis. Ec=5000√fck=5000√30=27386.13 MPa.

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