As per touch typing rules, the left index finger should be placed on which key in home row of the keyboard?

The left index finger should be placed on the "F" key in the home row of the keyboard according to touch typing rules. The home row is the row of keys where the fingers rest, and it typically consists of the keys A, S, D, F, G, H, J, K, L, and ; (semicolon).

For optimal finger placement, the left hand's fingers are generally positioned such that:

• The pinky finger rests on the "A" key,
• The ring finger rests on the "S" key,
• The middle finger rests on the "D" key,
• The index finger rests on the "F" key.

This facilitates efficient finger movement and improves typing speed and accuracy. The use of the home row helps typists maintain proper posture and hand positioning, which are essential for developing muscle memory and reducing fatigue during prolonged typing sessions.