Assuming your husband is the one who is going to be employed in Singapore, normally the employer would apply for an Employment Pass (EP) for him. For you and any child(ren) accompanying him, application is normally made at the same time (again by the employer) for a Dependant's' Pass (DP) for each accompanying person. So if (as is likely) this applies to your family, then yes, you would tick the 'Dependant's' Pass' box.
The EP/DP application would usually be done before you move to Singapore but the passes can only be collected once you are here. The Ministry of Manpower (MOM) issues an In Principle Approval (IPA) letter which can be used when entering Singapore, and for the purpose of completing the formalities and collecting the passes.
There are other alternatives to DPs in some circumstances, so if you want to be 100% sure you could check with the HR department.
More details here:
http://mom.gov.sg/foreign-manpower/pass ... fault.aspx