Match List I (Quantity) with List II (Units) and select the correct answer using the codes given below the Lists:

List I (Quantity)

1. High speed
2. Wavelength
3. Pressure
4. Energy

List II (Units)

1. Mach
2. Angstrom
3. Pascal
4. Joule

Codes:

1. I-B, II-A, III-C, IV-D
2. I-A, II-B, III-D, IV-C
3. I-A, II-B, III-C, IV-D
4. I-B, II-A, III-D, IV-C

Explanation

Option (c) is correct

• High speed is measured in Mach number (A), especially for speeds relative to the speed of sound. Wavelength is commonly expressed in Angstrom (B) for atomic and light-scale measurements. Pressure is measured in Pascal (C), while energy is measured in Joule (D).

Answer: (c) I-A, II-B, III-C, IV-D