Which of the following options is/are true for K-fold cross-validation?
1) Increase in K will result in higher time required to cross validate the result.
2) Higher values of K will result in higher confidence on the cross-validation result as compared to lower value of K.
3) If K=N, then it is called Leave one out cross validation, where N is the number of observations
a. 1 and 2
b. 2 and 3
c. 1 and 3
d. 1, 2 and 3
