If every seconds Saturday and all Sundays are holidays in a 30 days month beginning on Saturday then...........

Explanation:

As month begins on Saturday, so 2nd, 9th, 16th, 23rd, 30th days will be Sundays.

While 8th and 22nd days are second Saturdays. Thus, there are 7 holidays in all.

Hence, no. of working days = 30 – 7 =23

Hence, option 2 is the correct answer.