Print a specific row and row+1 based on column value in Python Dataframe

I have a python dataframe as shown below, I am trying to access rows based on value of column C. When Column C==1, I want to print the corresponding row and row+1 side by side as shown in expected output below. Please note when there are continuous 1's it should print multiple pairs as shown below in expected result.

Input Dataframe:

A	B	C
F	M	1
S	P	3
a	c	1
h	g	1
k	j	2
c	p	4
q	b	1
S	P	1
F	z	1
q	z	2

Expected Output Format:

1. F, M, 1; S, P, 3
2. a, c, 1; h, g, 1
3. h, g, 1; k, j, 2 
4. q, b, 1; S, P, 1
5. S, P, 1; F, z, 1
6. F, z, 1; q, z, 1

I was trying to doing something like:

if (df['c'] == 1):
  print...

I see following error: ValueError: The truth value of a DataFrame is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().

Please help me with some ideas to print the pattern described. Thanks in advance!!