The chart of accounts for Corwin Computer Services includes the following:

$\backslash$table$[[$Account Name,Account Number$],[$Cash$,11],[$Accounts Receivable,$13],[$Prepaid Insurance,$15],[$Accounts Payable,$21],[$Unearned Revenue,$24],[$L$.$ Corwin, Capital,$31],[$L$.$ Corwin, Drawing,$32],[$Fees Earned,$41],[$Salaries Expense,$54],[$Rent Expense,$56]]$

Page $3$ of the journal contains the following entry:

$\backslash$table$[[$Description$,$Post. Ref.,Debit,Credit$],[$Prepaid Insurance,$1,530,,],[$Cash$,,1,530,]]$

What posting references will be found in the journal entry?

a$.15,11$

b$.15,3$

c$.11,3$

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