Consider the following statements about a solenoid:1. The magnetic field strength in a solenoid depends upon the number of turns per unit length in the solenoid2. The magnetic field strength in a solenoid depends upon the current flowing in the wire of the solenoid3. The magnetic field strength in a solenoid depends upon the diameter of the solenoidWhich of the statements given above are correct?

• A. 1, 2 and 3
• B. 1 and 3 only
• C. 2 and 3 only
• D. 1 and 2 only