Match List I with List II
List I (Elements) List II (Colour imparted to the flame)
A.      K                  I.   Brick Red
B.      Ca               II.    Violet
C.      Sr                III.    Apple Green
D.      Ba               IV.    Crimson Red
Choose the correct answer from the options given below:

We need to match elements with their flame test colours.

The characteristic flame colours of alkali and alkaline earth metals are:

• K (Potassium) — Violet
• Ca (Calcium) — Brick Red
• Sr (Strontium) — Crimson Red (or Apple Red)
• Ba (Barium) — Apple Green (or Yellow-Green)

A. K → II (Violet)

B. Ca → I (Brick Red)

C. Sr → IV (Crimson Red)

D. Ba → III (Apple Green)

The correct matching is A-II, B-I, C-IV, D-III.

The correct answer is Option C: A-II, B-I, C-IV, D-III.