Different types of electroencephalography (EEG) waves (Column X) and their corresponding characteristics (Column Y) are listed below:
| Column X (EEG Waves) | Column Y (Characteristics) |
| a. Alpha waves | i. Associated with deep sleep |
| b. Beta waves | ii. Occur during wakefulness, high-frequency waves |
| c. Theta waves | iii. Associated with relaxation and calmness, seen during meditation |
| d. Delta waves | iv. Slow brain waves, seen in light sleep or drowsiness |
Which one of the following options represents the correct match between Column X and Column Y?
1
a - iii, b - ii, c - iv, d - i
2
a - ii, b - iv, c - i, d - iii
3
a - iv, b - i, c - ii, d - iii
4
a - i, b - iii, c - ii, d - iv