Correct option is A
Let the value of Y be 15x
Initial quantity of milk = 1/5×15x= 3x liters
Initial quantity of water = 4/5×15x= 12x liters
ATQ,
[1/3×3x]/[1/3×12x+0.25] =4/19
19x = 16x +1
3x = 1
x = 1/3
Y = 15x = 5