Two students appeared simultaneously for an entrance exam. If the probability that the first student gets qualified in the exam is $\frac{1}{4}$ and the probability that the second student gets qualified in the same exam is $\frac{2}{5}$, then the probability that atleast one of them gets qualified in that exam is

• A

  $\frac{1}{10}$
• B

  $\frac{7}{20}$
• C

  $\frac{6}{10}$
• Correct answer
  D

  $\frac{11}{20}$

Hence, the correct answer is option: 'D'.