Which of the following are considered nonparametric tests?
a) MannWhitney U test
b) KruskalWallis test
c) Ftest
d) Ttest
e) Chisquare test
Choose the correct option from the following:
NonParametric Tests  Parametric Tests 
Statistical tests that are not based on a normal distribution of data or on any other assumption are known as distributionfree tests or nonparametric tests. The data is generally ranked or grouped.  Parametric tests normally involve data expressed in absolute numbers or values rather than ranks. Parametric tests are useful as these tests are most powerful for testing the significance or trustworthiness of the computed sample statistics. 
Examples include the Chisquare test, Spearman’s rank correlation coefficient, MannWhitney U test, KruskalWallis H test, etc.  Examples include the Student’s ttest, Ftest, ANOVA, etc. 
In this, the statistics are based on the ranks of observations and do not depend on any distribution of the population. 
However, their use is based upon certain assumptions. These assumptions are based on the nature of the population distribution and on the way the type of scale is used to quantify the data measures.

Therefore, option 1 is the correct answer.