help with nesting if else statements

Hello,

I have a data frame as shown bellow.
I want to create a new column PHENO which will be defined as follows:
if CURRELIG==1 -> PHENO==1
in the above subset those that have:
PLASER==2 -> PHENO==2
and
those where RTNPTHY==1 -> PHENO==1

I tried doing this:
a$PHENO=ifelse(a$CURRELIG==1 | a$RTNPTHY==1  ,1,ifelse(a$PLASER==2 |
a$RTNPTHY==2,2,NA))

but this give me some lines where I am not seeing results that I want,
for example:
FID           IID CURRELIG PLASER RTNPTHY PHENO
fam5628 G5628        1                 2       2                1

here the PHENO should be =2 because RTNPTHY==2 and PLASER==2
PHENO should be ==2 when either RTNPTHY==2 or PLASER==2

another wrong line is this:
FID              IID CURRELIG PLASER RTNPTHY PHENO
fam5706    G5706        1            1                 2             1

again RTNPTHY ==2 and PHENO==1 instead of 2.

My data looks like this:
FID  IID CURRELIG PLASER RTNPTHY
fam5610 G5610        1      1       1
fam5614 G5614        1      2       2
fam5615 G5615        1      1       1
fam5618 G5618        1      1       2
fam5621 G5621        1      1       1
fam5624 G5624        1      1       2
fam5625 G5625        1      1       1
fam5628 G5628        1      2       2
fam5633 G5633        1      2       2
fam5634 G5634        1      1       1
fam5635 G5635        2      2       2
fam5636 G5636        1      1       1
fam5641 G5641        1      1       1
fam5645 G5645        2      1       2
fam5646 G5646        2      2       2
fam5654 G5654        1      2       2
fam5655 G5655        1      2       2
fam5656 G5656        2      2       2
fam5658 G5658        1      1       1
fam5659 G5659        2      2       2
fam5660 G5660        1      1       1
fam5661 G5661        2      2       2
fam5664 G5664        1      1       1
fam5666 G5666        1      1       1
fam5667 G5667        1      1       2
fam5670 G5670        1      1       1
fam5671 G5671        1      1       2
fam5672 G5672        1      1       2
fam5673 G5673        1      1       1
fam5680 G5680        1      2       2
fam5686 G5686        1      2       2
fam5687 G5687        1      2       2
fam5688 G5688        1      1       2
fam5693 G5693        2      1       1
fam5695 G5695        1      1       1
fam5697 G5697        1      1       1
fam5700 G5700        1      2       2
fam5701 G5701        1      1       1
fam5706 G5706        1      1       2
fam5709 G5709        1      1       1
fam5713 G5713        1      1       1
fam5715 G5715        1      1       1
fam5718 G5718        1      1       1

Please advise,
Ana