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    Question

    Match List-I (Quantity) with List-II (Unit) and select

    the correct answer using the codes given below:
    A A-2, B-1, C-3, D-4 Correct Answer Incorrect Answer
    B A-1, B-2, C-4, D-3 Correct Answer Incorrect Answer
    C A-1, B-2, C-3, D-4 Correct Answer Incorrect Answer
    D A-2, B-1, C-4, D-3 Correct Answer Incorrect Answer

    Solution

    The correct matching is: • A. High Velocity — Mach (1) • B. Wavelength of Light — Angstrom (2) • C. Pressure — Pascal (3) • D. Energy — Joule (4) Thus, the correct sequence is A-1, B-2, C-3, D-4, which corresponds to option (c). • Mach is a unit for measuring speed relative to the speed of sound. (Mach 1 = speed of sound) • Angstrom (Å) is commonly used to measure very small lengths such as the wavelength of light (1 Å = 10⁻¹⁰ meters). • Pascal (Pa) is the SI unit of pressure (1 Pa = 1 N/m²). • Joule (J) is the SI unit of energy (1 J = 1 Nm).

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