If applicants for 80000 shares were allotted 60000 shares on a pro-rata basis, the shareholder who was allotted 1500 shares must have applied for:

2000 shares

The correct answer is option 4- 2000 shares.

Total applied shares = 80000 
Total allotted shares = 60000

Those who allotted 60000 shares applied for 80000 shares
Who allotted shares 1500 shares applied for = 80000/60000 X 1500
                                                               = 2000 shares